Crossed Roller Bearing

Crossed roller bearing are linear-motion devices that provide more accuracy, rigidity and load capacity than ball bearings. They can also support radial, thrust and moment loads.

Metal cages tend to drift from the linear bearing's longitudinal center over time, a condition called cage creep. Resin cages allow a longer stroke length on a given rail for a specific load.

High Precision

Crossed roller bearings provide high rotational accuracy and rigidity in a compact package. They are able to support axial forces in both directions, radial forces and tilting moment loads with one bearing position. This allows designers to simplify designs and reduce component count.

The bearing’s contact area with the mounting surface is a direct factor in its load capacity. A greater area lets engineers increase the load-carrying capability by arranging the rollers closer together. However, this increases the risk of misalignment between the rollers and rails.

A major player in the global market is designing and manufacturing high-precision crossed roller bearings for industrial robots and cobots. Other players are also focusing on enhancing their production facilities in the region to boost the growth of the industry. The rising demand for heavy machinery in end-use industries such as automotive, aerospace and renewable energy will further accelerate the growth of the crossed roller bearings market. In addition, the government of various countries is focusing on strengthening their defense and medical sectors that require sophisticated machinery.

High Load Capacity

Crossed roller bearings provide the benefits of a two-row bearing (including stability) in one row space. They can support axial forces in both directions, tilting moment loads and any combination of these. They deform less than recirculating ball bearings, and they are stiffer, resulting in consistently precise movement.

The X arrangement of the rollers provides a much larger contact area than recirculating ball bearings. This allows designers to increase load capacity by up to 250% in some applications. This increases the amount of weight a linear rail or slide can carry without damaging the bearing or increasing friction.

Because the rollers are closer together, they require less space than other linear bearings with metal cages. They can also accommodate more rollers in the same space, which increases the total load capacity. However, it is important to keep them lubricated and free of contaminants to protect them from damage and wear. This is especially critical in high-precision applications such as IC manufacturing equipment or laboratory tools.

High Rigidity

Crossed roller bearing is a compact type of linear bearings with cylindrical rollers crossing each other at right angles between the inner and outer rings. They can withstand radial and axial loads as well as tilting moment forces. They are widely used in industrial robots, machine tools and medical equipment due to their high rigidity and rotational accuracy.

This is mainly because the rollers are arranged with a spacer to prevent them from separating. Their structure makes them more stable and compact than a double row angular contact ball bearing. They also have good resistance to vibration and noise.

The demand for precision crossed roller bearings is growing rapidly in the global market. It is mainly due to the increased adoption of robotics in the manufacturing sector and the up-gradation of existing and new production facilities. Moreover, the rising demand for automotive and renewable energy industries is further propelling the growth of this industry. The leading players are focusing on expanding their current product offerings, investing in research and development of customized bearings, and improving their operating cost structures to boost their market share.

Compact Design

With one crossed roller bearing you can replace a number of ball bearings, reducing the overall cost and weight of the device. They are also more rigid than linear ball bearings, meaning that they don’t deform as easily under load and can handle a wider range of mounting surface inaccuracies than recirculating ball bearings.

The rolling elements in crossed roller bearings are alternately crossed at right angles to each other between inner and outer rings. Nylon spacers are placed between each roller to prevent them from skewing, resulting in reduced friction between the rolling elements and increasing the rotational accuracy of the bearing.

Crossed roller bearings are used across a wide range of applications including packaging equipment, industrial robots and semiconductor manufacturing equipment. Their compact design and high load capacity make them a perfect choice for applications that require precise movement in short strokes. They are also durable, lasting 150 million cycles, and can accommodate a wide variety of acceleration and deceleration rates.